FEATURES OF METAL MATERIALS FOR STENTS PRODUCTION
Journal Title: Вісник Кременчуцького національного університету імені Михайла Остроградського - Year 2017, Vol 1, Issue 106
Abstract
Purpose. To review and analise the properties of common metallic materials for the removal of stents and coverage of the most important stages of their production; the calculation and evaluation of the structural strength 3D-model of medical steel stent in Solid Works 2016 software environment; studying of the stent pattern for its strain in the vessel and detection of zones of the most probable occurrence of restenosis. Methodology. We have applied the mathematical simulation to construct a stent model. for calculations medical steel was chosen, which in its characteristics is fully suitable for the manufacture of vascular stent. For the constructed model a static analysis was performed. The maximum load on the model is 4.178e + 007 Pa. Results. We have developed the mathematical model and completed the static analysis and calculated loadings on the stent model and defined zones of maximum load, which is estimated by the Mises criterion (vonMises), displacement and deformation, which made it possible to estimate the structural strength during the influence on it of internal factors in the vessel. This allows us to examine the stent parameters based on the obtained mathematical model, and to choose optimal parameters of construction and reduce substantially the time and expenses needed for the developing ofmodels. We have obtained the most probable zones of re-occlusion of the vessel (restenosis), from which it was concluded that it is expedient to apply a more dense antiproliferative coating on the stent after the endovascular intervention. Originality. We have carried out the research of vascular stent behavior in the SolidWorks 2016 software environment, assessed the strength of the structure during the influence of internal factors in the vessel and determined the areas of the most likely re-occlusion of the vessel, which makes it possible to produce more reliable and durable stents, as well as to minimize the possible consequences of endovascular intervention. Prac- tical value.The experimental studies have confirmed the adequacy of the model which allows designing model for determination of zones of reocclusion of the vessel. References 11, tables 2, figures 3.
Authors and Affiliations
О. Kaurkovskaya, E. Bespalova
Keywords
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